Thomas-lalok



.a change i'n the numbers on the indicators,f, g, and L.

@uiten tats tttrat @Hite HARDING, AND BARTHOLOMEW LALOR.

Lettersllatcllt No. 80,637,id1 zted idler/ust 4, 1868.

IMPROVEMENT IN INDIoAron-Locrs;

@its Simula nient in in ilgrse Lfters ntmt nn mating part nf tige sind.

TO ALL WHOM 1T MY GONCERN; i

Be it known that I, THOMAS LALOR, of tho city of Toronto, in the Province of Ontario; and Dominion et" Canada, have invented a new and useful Detector-Lock; and I do hereby declare that the following is a full, clear, and exact description of the same, which will enable others skilled in the art to make and use the same, reference being had-to the accompanying drawings, and to the letters of reference thereon.

Fig'xire 1 represents a side view of the key of my improved lock.

Figure 2 is a face 'view of the lock, showing the face-plate removed.

Figure 3 is a detail face view of theloek, without the faceplaltc and tumhlers.

' Figure 4 is a face view ofthe lock, without tborfront plato that covers the indicating-wheels.

Figure5 is au edge view of the lock. v Figure 6 is a fullfacc view of the lock.

Figure 7 is a detail perspective view of the cylinder by means whiohthe indicator-wheels are operated. Figure 8 is a. detail sectional view, taken on the plano of tho line x z, Aiig. 6.

Figure 9 is a sectional-view, taken'on the' plane of thcline y y, iig. i.

Similar letters of reference indicate corresponding parts.

The nature of my invention consists in providing the lock with wheels or indicators, each uiarked with the iigurcs 0 and 1 to 9; inclusive, which wheels or indicators are connected with certain machinery inside the lock, hereinafter described, so that the lock cannot be opened without a change being milde in the Dumbl'SOnl-w said indicators, as seen through a number of small apertures in the fade of the lock- The figures on the said indicators are capable of nine hundred and ninety-nine, or more or less, changes, which changes cannot be repeated without the destruction of a seal, made of lead or other material.

',lo enable others skilled in the art to make andtusc my invention, I will proceed to describe its construction and operation. In the drawing- A 'A represents a padlock-case.

B the front plate of the same.

The invention may, however, be also applied to locks ol" other shape and kind.

Inside the lock is fitted a rotating cylinder, 1, on which a ratchet-wheel orilange, 1, is formed. This cylinder is connected with a spring, b, which prevents it from ever turning iu the direction of thcarrow, 1, figs. 2, 3. This cylinder is acted upon by a slide-bolt, d, iig. 3, which, beingv pushed upwards by the turning of thc key, c, figs. 1 and 5, causes the cylinder to turn sufliciently in the direction of the arrow 2 to lct the spring b catch into another tooth, and, by its motion, te turn also a wheel or indicat0r,f, fig 4, fitted t0 the axle 0f tll cylinder. The cylinder, after this partial revolution, is locked by the two tumblc-rS, c, iig. 2, the hOOk-Slmpcll ends, r, of which tit into apertures or indentations fornied in or through the sides of the cylinder, which tumblers are released by the action of the key, at the saure time that the slide-bolt d, iig. 3, is pushed upwards.

When the key is inserted, it iii-st acts on the tuinblers, so as to free the cylinder, and to allow the slide to bc raised, and it then raises the slide, so as to turn the cylinder. rlhe 'slide-bolt is replaced in its original position by the turning lm k oi' the key aftcrthc lock has been opened.

Attached to thc slide-bolt d, fig. 3, there is a guard,p, figs. 2 and 3, which, when the slide-bolt is replaced in its original position, as above described, completely covers the face of tlrolocking-bolts n, tig. 2, so that noaccess can be had to them through the key-hole, without pushing the sliding boltd upwards, and thus causing The wheels f, g, and L are arranged on the outside of the.plate B, and are geared together in the manner indicated in tig. 4, and are confined in a case, C, which is iixed to the plate B, und in which case apertures, 1 2 3, are formed, through which one figure of cach wheelfg h can be seen.

On the wheel or indicatorf, iig. 4, there are the figures 0 nnd 1 to 0, inclusive, and this wheel is so adjusted that one turn of the key, which is required to open the lock, acting en the slide-bolt and cylindcr, as above described. will cause that one ofthe figures which could be seen through the aperture 1 in the 'face of the case C to disappear, and the ligure' next in succession to take its place, one complete revolution ofthe wheelf'causing .ten changes in the said figures. Connected with this wheel, and moved by it by gearing, there is u second wheel or indicator, g, fig. 4, numbered Vin like mannerfonly that each figure isor may be repeated three, morb or less, times, the size of cach figure of thesame denomination gradually diminishing as it approaches the figure next to it in succession, as shown in fig. 4. v

On every complete revolution of the wheel f, one of the'ligures on the wheel g, repeated three times, as

above described, passes under apoint, s, in the second aperture 2; ten complete revolutions of the wheelf being required to complete one revolution of the wheel g, and thus `to produce ninety-nine changes in the numbers read oi from the two wheels. Connected with the wheel g, and moved by it, there is s. third wheel or indicator, h, iig-4, numberedin the same manner as the wheel g, only that the numbers are'placed. in reverse order tothe numbers on the wheel g, as h revolves in the opposite direction.v

On every complete revolution of the wheel g, one of the figures on the wheel h, repeated three times, as

vabove described, passes under a point, `s,in a third aperture, 3, in the` face of the lock; ten complete revolutions of thc wheel g, and one hundred complete revolutions ofthe wheelf, being required to complete one revolution of thc wheel h, and thus to produce nine hundred and ninety-nine "changes in the numbers read o`.from the three wheels, the numbers on the right-hand wheel,f, indicating the unit figures, the numbers on the next wheel, g, the tens, and the numbers on the next wheclLL, the hundreds. The size of the igiires on the last two mentioned wheels diminishes, or may do so, as theyapproach the numbers next in succession, which must be taken as soon as the stroke between the small and the large numbers appears under thepoint s in the aperture.

When a complete revolution of all the wheels has been mede, n. projection, j, oh the third wheel, h, is caught by a pin, i, which is fastened to the face ofthe lock by a screw, k, figs. 4 and 8, which screw is countersunk, as in tig. 8, the indentation, l, being larger at the base than at the top, for the reception of a seal of lead or other material, and which seal, before the screw k, by which the pin is fastened, can be taken out, must necessarily be destroyed. Over the three apertures 1, `2, and 3, there is a slide, m, fig. 6, by which thc said apertures can at once be covered over, so as to protect them from dust and dirt.

The lockl is furnished with three, or more or less, bolts, u, figs. 2 and 9, cach of which net only has an independent action, but catches the shackle O, figs. 2 and 5, both at thel back and front,'thus affording the security* of a double number of fastenings, and preventing the lock from being picked by an instrument which does not at once operate in ,thc necessary manner on nll bolts. p 1

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The cylinder a, arranged in the lock in such manner that it will-cause thcvmotion of the indicator, whenever the key is operated, toppen the lock, as set forth.

2. The slide-bolt d, by which the'cylinder a is moved, as described. z

3. So'constructing the tumblers of a ylock that they will lock the cylinder a, substantially in the manner herein shown and described. v

4. The guard, p', attached to the slidebolt d, for the purpose of protecting the bolts, n, to prevent the lock-from being picked, as set forth. l

5. The application of indicatorwhee ls,fg h, or their equivalcntsl,`to a lock, the same being moved or set, whenever the key is turned in the leek, substantially as end for the purpose herein shown and described.

. 6. The combination of the indicator-wheels with the locking-pin whichncau be protected by a seal, as set forth. 4

The abo've specification of my invention signed by me, this 15th day of June, 1868. THOMAS LALOP..

Witn esses Gro. MmKELcoRoUGII, .Lunas ANDERSON. l 

